TELEFUNKEN LEDModel: TF-LED32S19
Chassis / Version: MS306D
Panel: LVW320CS0T
LED backlight: 32HR330M07A2 V2 4C-LB3207-HQ1
T-CON: MT3151A05-5-XC-5
LED driver (backlight): integrated in MainBoard
Power supply (PSU): integrated into the MainBoard
PWM power: PWM SOT23-6
Main board: 40-MS306D-MAD2LG
IC MainBoard: SPI FLASH: W25Q32FVSIG
Tuner: 03-6MADI3-TF40
TELEFUNKEN TF-LED32S19
General Repair Instructions for LCD LCD TVs
Possible manifestations of faults
- The TELEFUNKEN TF-LED32S19 television does not switch on at all. There is no reaction to the buttons on the remote control and the front panel. The LEDs do not light up and do not flash.
In such cases, the AC / DC voltage converter is often faulty, which is combined with the main board 40-MS306D-MAD2LG. It is necessary to measure its output voltages and, in case of absence, to check the correct operation of the power switches and rectification diodes in the converters in order to avoid any faults.
In the event of failure of the secondary circuits, the converter can operate in emergency short-circuit mode and during a short-circuit in the power elements of the primary circuit, the fuse or the current sensor at the source of the key breaks more often.
Mos-Fet switches, used in switch mode power supplies, sometimes fail due to a malfunction of any other element that could put it out of service in key mode or create an excess of the maximum admissible parameters of the switch. These can be elements supplying the PWM controller, frequency adjustment or damping circuits, or negative feedback elements in the stabilization circuit. PWM SOT23-6 The PWM controllers, in the absence of visible damage or an obvious short circuit between the terminals, are checked by replacing them with new ones or by operating obviously.
- There is no picture, there is sound, there is a reaction to the remote control. Or immediately after turning it on for a second, the image may appear and disappear immediately.
Often in such cases there is no LED backlight. This can be due to both the power supply of the LEDs, their operating state (failure or breakage) and the violation of the contact connections of the LED strips.
To detect a break in the LED lines without dismantling the panel, a current source is necessary. It is impossible to open transitions connected in series with a simple multimeter, a voltage of several tens of volts is necessary.
- The television does not switch on, the indicator signals a standby or operating mode or flashes.
Repairing or diagnosing the 40-MS306D-MAD2LG motherboard should start by checking the stabilizers and power converters needed to power the chips and matrix. If necessary, you must update or replace the software (software). If an attempt is made to repair the MB card, it is necessary to check the state of health of its elements - SPI FLASH: W25Q32FVSIG, which may require replacement with new ones. If the BGA processor is installed, it is possible that the solder of the contacts of its conclusions with the card is soldered (it is diagnosed by heating).
If the TV operates normally from external devices, but does not tune in the TV channels, the 03-6MADI3-TF40 tuner may not work properly. In this case, you must first make sure that there are supply voltages at the corresponding terminals. You should also ensure that the tuner and the processor can exchange data via the I2C bus. Sometimes the cause of the inoperability of the tuner can be a software failure.
Owners and users of the TELEFUNKEN TF-LED32S19 TV should remember that self-repair without special knowledge, skills and qualifications can have serious negative consequences which can lead to total non-repairability of the device.
FIRMWARE SPI FLASH ----------------> TELEFUNKEN TF-LED32S19, Main: 40-MS306D-MAD2LG, Panel: LVW320CS0T
The appearance of the MainBoard 40-MS306D-MAD2LG is illustrated in the figure below:40-MS306D-MAD2LG
40-MS306D-MAD2LG can be used in televisions:
TELEFUNKEN TF-LED28S19 (Panel LVW280CSOT), TELEFUNKEN TF-LED32S19 (Panel LVW320CS0T).
Main characteristics of the TELEFUNKEN TF-LED32S19 device:
Installed matrix (LED panel) LVW320CS0T.
The matrix control uses the synchronization controller (T-CON) MT3151A05-5-XC-5.
A converter is used to power the backlight LEDs, associated with the main board 40-MS306D-MAD2LG.
The power module is combined with the MainBoard and is manufactured in accordance with the AC / DC Flyback voltage conversion circuit using PWM SOT23-6 microcircuits